| 摘要 |
PROBLEM TO BE SOLVED: To allow an individual radio communication apparatuses to independently adjust, in simple circuit configuration, properties of a noise filter that reduces conduction noise superposed in a power line.SOLUTION: A voltage level of a power line connected to a noise filter 11 is measured by noise level detection means 12, and the measured voltage level is converted into a digital voltage signal and outputted. When inputting a reception signal that is received by a radio part 15, signal processing means 13 calculates and outputs a channel estimate required for demodulating and decoding a reception baseband signal on the basis of a reference signal and when inputting the digital voltage signal outputted by the level detection means 12, the signal processing means 13 calculates and outputs a power density of a noise signal. On the basis of the power density of the noise signal outputted from the signal processing means 13, control means 14 determines and sets a circuit constant of the noise filter 11, and optimization control is executed so as to minimize the power density of the noise signal. |
